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CVE-2026-48095

7-Zip is a file archiver with a high compression ratio. Versions 26.00 and prior contain a heap buffer overflow vulnerability caused by an under-allocation in the NTFS compressed stream buffer (GetCuSize shift UB), potentially allowing attackers to cause arbitrary code execution or application crashes. CInStream::GetCuSize() in the NTFS handler computes the compression-unit buffer size as (UInt32)1 << (BlockSizeLog + CompressionUnit), and a crafted image with ClusterSizeLog >= 28 and Compression
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e808e2635f4b59440c3859da485a45882390228ceda8893559a100bd5534b4be
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-190","description":"CWE-190: Integer Overflow or Wraparound","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4bc26c67a190791e4a682408ac0d3c4ed3212cb341c874d7bee66565f375d68f · sha256:2b0a2847b071ce25… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-787","description":"CWE-787: Out-of-bounds Write","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4bc26c67a190791e4a682408ac0d3c4ed3212cb341c874d7bee66565f375d68f · sha256:2b0a2847b071ce25… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"7-Zip","vendor":"mcmilk","versions":[{"status":"affected","version":"<= 26.00"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4bc26c67a190791e4a682408ac0d3c4ed3212cb341c874d7bee66565f375d68f · sha256:2b0a2847b071ce25… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4bc26c67a190791e4a682408ac0d3c4ed3212cb341c874d7bee66565f375d68f · sha256:2b0a2847b071ce25… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-190","description":"CWE-190: Integer Overflow or Wraparound","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4bc26c67a190791e4a682408ac0d3c4ed3212cb341c874d7bee66565f375d68f · sha256:2b0a2847b071ce25… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-787","description":"CWE-787: Out-of-bounds Write","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4bc26c67a190791e4a682408ac0d3c4ed3212cb341c874d7bee66565f375d68f · sha256:2b0a2847b071ce25… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"tags":["exploit"],"url":"https://securitylab.github.com/advisories/GHSL-2026-140_7-Zip/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4bc26c67a190791e4a682408ac0d3c4ed3212cb341c874d7bee66565f375d68f · sha256:2b0a2847b071ce25… · /containers/adp/0/references/0
{"name":"https://securitylab.github.com/advisories/GHSL-2026-140_7-Zip/","tags":["x_refsource_CONFIRM"],"url":"https://securitylab.github.com/advisories/GHSL-2026-140_7-Zip/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4bc26c67a190791e4a682408ac0d3c4ed3212cb341c874d7bee66565f375d68f · sha256:2b0a2847b071ce25… · /containers/cna/references/0
{"name":"https://sourceforge.net/p/sevenzip/discussion/45797/thread/555e132ba4","tags":["x_refsource_MISC"],"url":"https://sourceforge.net/p/sevenzip/discussion/45797/thread/555e132ba4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4bc26c67a190791e4a682408ac0d3c4ed3212cb341c874d7bee66565f375d68f · sha256:2b0a2847b071ce25… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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